In this lesson, our Raspberry Pi robot car will use Ultrasonic sensor to detect obstacles and make automatic driving and avoid collision.
You must complete Lesson 1 basic frame work installation as per following link:
You also need connect Ultrasonic sensor to following GPIO port:
|Ultrasonic Sensor||location||GPIO#||Physical Pin#|
SERVO 黄/红/咖啡线 接PCA9685 PWM 15 插口
you can check the GPIO pin location in following graph:
电机ENA ，ENB，IN1，IN2，IN3，IN4，PCA9685连线同第一课 https://osoyoo.com/2020/03/19/how-to-use-osoyoo-model-pi-l298n-motor-driver-board-in-raspberry-pi-robot-car/
Download the python code by typing following command in your Raspberry Pi terminal:
Turn on the battery of your car and your servo
Your servo will rotate the ultrasonic sensor to front position for 3 seconds. If your sensor is not facing front direction, please turn off the battery or press Ctrl-C key to stop the program. Then remove the sensor from servo and re-install it, make sure it faces front and fix the position with screw, now your can type same command python picar-obstacle-avoid.py and run the program again.
Now the car will automatically make obstacle avoidance auto driving.
DownLoad Url osoyoo.com